In Fig. REF , we compare several different multi-purpose MC event generators to measurements of two the photon and \(\pi ^0\)  scaled momenta. We consider three event generators in these comparisons; Herwig 7.1.3 [1]} using both the angular-ordered [2]} and dipole [3]}, [4]} shower algorithms and a cluster based hadronisation model [5]}, Pythia 8.2.35 with the default
model of hadronisation [6]} and Sherpa 2.2.5 [7]} with the CSS parton shower [8]} using both the Ahadic [9]} (based on the cluster model) and the Pythia 6.4 Lund hadronisation [10]} models. The curve corresponding to Pythia is shown with an uncertainty band (red) obtained using the results of our new tune, based on the recent Monash tune but refitting the three main hadronisation parameters (see below). We can see from Fig. REF  that the multi-purpose event generators agree pretty well except in a few regions such as e.g. in the tails towards hard high-energy photons.
